How can a notification problem be correcte?

One of my "followers"[email redacted]- is not receiving notifications when I post something new. He's checked his spam folder, but the notification hasn't been there either. Could you please see that this is corrected?
Thanks
Blog url: http://fromtheslowlane.wordpress.com/

I checked with him, and he has not ever unsubscribed. In fact, when he didn't get notification of my latest post, he tried to subscribe again, thinking maybe something was wrong with his first subscription. He was informed that he would receive confirmation of this new subscription, but no e-mail ever came through.

Further question--would it be possible for you to unsubscribe him from your end and see what would happen if he started over again? Who knows--it's just possible that he did unsubscribe by accident. Just a thought.

Sigh. He just subscribed again, but no confirmation e-mail from WordPress. He'll check his spam tomorrow (that only shows up once a day). If your confirmation e-mail is in there, I'll let you know. Otherwise, do we just assume it's a problem with his e-mail provider?

Hurray! Your confirmation e-mail appeared this morning in the follower's spam folder, and he has now asked his e-mail provider to allow mail from WordPress to come through. So hope this will continue to work.